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Bospoort Dam
Bospoort Dam is a gravity/earth-fill type dam on the Hex River, a tributary of the Elands River, part of the Crocodile River (Limpopo) basin. It is located near Rustenburg, North West, South Africa. Its primary purpose is for irrigation. History It was established in 1933. It was originally the main water supply for the town of Rustenburg. In the sixties it was no longer used for drinking water due to contamination from platinum and chrome mines in the region. Due to water shortages in the nineties it was again used as the main water source for the Boitekong and surrounding townships. The fish in the dam are not fit for human consumption. The water in the dam in so corrosive that the steel sluices had to be replaced by a major rebuilding project in 2009 and 2010 for fear of the dam wall collapsing in a flood. The new dam structure was built from corrosion resistant compounds. See also *List of reservoirs and dams in South Africa The following is a partial list of d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hex River (Elands River)
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Hex River may refer to: * Hex River (Breede River), a tributary of the Breede River in South Africa * Hex River (Rustenburg), passing through Rustenburg, South Africa * Hex River (Elands River), a tributary of the Elands River in South Africa See also * Hex River Mountains * Hex River Pass * Hex River Poort Pass * Hex River Tunnels The four Hex River Tunnels consist of a twin tunnel of and three single tunnels of , and , on the Hexton railway route between De Doorns and Kleinstraat through the Hex River Mountains of the Western Cape Province, South Africa. The line, wh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chromium
Chromium is a chemical element with the symbol Cr and atomic number 24. It is the first element in group 6. It is a steely-grey, lustrous, hard, and brittle transition metal. Chromium metal is valued for its high corrosion resistance and hardness. A major development in steel production was the discovery that steel could be made highly resistant to corrosion and discoloration by adding metallic chromium to form stainless steel. Stainless steel and chrome plating (electroplating with chromium) together comprise 85% of the commercial use. Chromium is also greatly valued as a metal that is able to be highly polished while resisting tarnishing. Polished chromium reflects almost 70% of the visible spectrum, and almost 90% of infrared light. The name of the element is derived from the Greek word χρῶμα, ''chrōma'', meaning color, because many chromium compounds are intensely colored. Industrial production of chromium proceeds from chromite ore (mostly FeCr2O4) to produce ferro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Rivers Of South Africa
This is a list of rivers in South Africa. It is quite common to find the Afrikaans word ''-rivier'' as part of the name. Another common suffix is "''-kamma''", from the Khoisan term for "river" Meiring, Barbara"South African Toponymic Guidelines for Map and other editors: Fourth Edition" 12. Retrieved on 30 April 2013. (often tautologically the English term "river" is added to the name). The Zulu word ''amanzi'' (water) also forms part of some river names. The Afrikaans term ''spruit'' (compare spring) often labels small rivers. List * A Drainage basin code assigned by the Department of Water Affairs (South Africa), a complete list is available at Drainage basins of South Africa Gallery Image:South Africa Topography.png, Topographic map of South Africa. Image:Orange watershed topo.png, Course and watershed of the Orange River with topography shading and political boundaries. Image:Groot River.jpg, Grootrivier in Nature's Valley, stained a tea colour by plant tannins ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Reservoirs And Dams In South Africa
The following is a partial list of dams in South Africa. __NOTOC__ In South African English (as well as Afrikaans), a dam refers to both the wall as well as the reservoir or lake that builds up as a consequence. List of dams (reservoirs) * N Nett or working capacity * G Gross or maximum capacity * I The Bedford and Bramhoek dams form part of the Ingula Pumped Storage Scheme * D The Driekloof and Kilburn dams form part of the Drakensberg Pumped Storage Scheme * P The Kogelberg and Rockview dams form part of the Palmiet Pumped Storage Scheme * S The Steenbras Dam – Upper and Steenbras Hydro-Electric Lower Dam form part of the Steenbras Pumped Storage Scheme * V The Voëlvlei Dam is an off-channel reservoir supplied by canals from the Klein Berg River, Leeu River and Vier-en-Twintig River, and discharging by canal into the Great Berg River. See also * Water supply and sanitation in South Africa * List of lakes of South Africa * List of rivers of South Africa * Lis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Corrosion
Corrosion is a natural process that converts a refined metal into a more chemically stable oxide. It is the gradual deterioration of materials (usually a metal) by chemical or electrochemical reaction with their environment. Corrosion engineering is the field dedicated to controlling and preventing corrosion. In the most common use of the word, this means electrochemical oxidation of metal in reaction with an oxidant such as oxygen, hydrogen or hydroxide. Rusting, the formation of iron oxides, is a well-known example of electrochemical corrosion. This type of damage typically produces oxide(s) or salt(s) of the original metal and results in a distinctive orange colouration. Corrosion can also occur in materials other than metals, such as ceramics or polymers, although in this context, the term "degradation" is more common. Corrosion degrades the useful properties of materials and structures including strength, appearance and permeability to liquids and gases. Many structural ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Corrosive Substance
A corrosive substance is one that will damage or destroy other substances with which it comes into contact by means of a chemical reaction. Etymology The word ''corrosive'' is derived from the Latin verb ''corrodere'', which means ''to gnaw'', indicating how these substances seem to "gnaw" their way through flesh or other materials. Chemical terms The word ''corrosive'' refers to any chemical that will dissolve the structure of an object. They can be acids, oxidizers, or bases. When they come in contact with a surface, the surface deteriorates. The deterioration can happen in minutes, e.g. concentrated hydrochloric acid spilled on skin; or slowly over days or years, e.g. the rusting of iron in a bridge. Sometimes the word ''caustic'' is used as a synonym for ''corrosive'' when referring to the effect on living tissues. At low concentrations, a corrosive substance is called an ''irritant'', and its effect on living tissue is called irritation. At high concentrations, a corro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mining
Mining is the extraction of valuable minerals or other geological materials from the Earth, usually from an ore body, lode, vein, seam, reef, or placer deposit. The exploitation of these deposits for raw material is based on the economic viability of investing in the equipment, labor, and energy required to extract, refine and transport the materials found at the mine to manufacturers who can use the material. Ores recovered by mining include metals, coal, oil shale, gemstones, limestone, chalk, dimension stone, rock salt, potash, gravel, and clay. Mining is required to obtain most materials that cannot be grown through agricultural processes, or feasibly created artificially in a laboratory or factory. Mining in a wider sense includes extraction of any non-renewable resource such as petroleum, natural gas, or even water. Modern mining processes involve prospecting for ore bodies, analysis of the profit potential of a proposed mine, extraction of the desired materials, an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Platinum
Platinum is a chemical element with the symbol Pt and atomic number 78. It is a dense, malleable, ductile, highly unreactive, precious, silverish-white transition metal. Its name originates from Spanish , a diminutive of "silver". Platinum is a member of the platinum group of elements and group 10 of the periodic table of elements. It has six naturally occurring isotopes. It is one of the rarer elements in Earth's crust, with an average abundance of approximately 5 μg/kg. It occurs in some nickel and copper ores along with some native deposits, mostly in South Africa, which accounts for ~80% of the world production. Because of its scarcity in Earth's crust, only a few hundred tonnes are produced annually, and given its important uses, it is highly valuable and is a major precious metal commodity. Platinum is one of the least reactive metals. It has remarkable resistance to corrosion, even at high temperatures, and is therefore considered a noble metal. Consequent ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
North West Province, South Africa
North West is a province of South Africa. Its capital is Mahikeng. The province is located to the west of the major population centre of Gauteng and south of Botswana. History North West was incorporated after the end of Apartheid in 1994, and includes parts of the former Transvaal Province and Cape Province, as well as most of the former bantustan of Bophuthatswana. It was the scene of political violence in Khutsong, Merafong City Local Municipality in 2006 and 2007, after cross-province municipalities were abolished and Merafong Municipality was transferred entirely to North West. Merafong has since been transferred to Gauteng province in 2009. This province is the birthplace of prominent political figures: Lucas Mangope, Moses Kotane, Ahmed Kathrada, Abram Onkgopotse Tiro, Ruth Mompati, J. B. Marks, Aziz Pahad, Essop Pahad and others. Law and government The provincial government consists of a premier, an executive council of ten ministers, and a legislature. The provincial ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Drinking Water
Drinking water is water that is used in drink or food preparation; potable water is water that is safe to be used as drinking water. The amount of drinking water required to maintain good health varies, and depends on physical activity level, age, health-related issues, and environmental conditions. This 2004 article focuses on the USA context and uses data collected from the US military. Recent work showed that the most important driver of water turnover which is closely linked to water requirements is energy expenditure. For those who work in a hot climate, up to a day may be required. Typically in developed countries, tap water meets drinking water quality standards, even though only a small proportion is actually consumed or used in food preparation. Other typical uses for tap water include washing, toilets, and irrigation. Greywater may also be used for toilets or irrigation. Its use for irrigation however may be associated with risks. Water may also be unacceptable due to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rustenburg
Rustenburg (; , Afrikaans and Dutch: ''City of Rest'') is a city at the foot of the Magaliesberg mountain range. Rustenburg is the most populous city in North West province, South Africa (549,575 in 2011 and 626,522 in the 2016 census). In 2017, the city's Gross Domestic Product (GDP) reached ZAR 63.8 billion, accounting for 21.1% of the GDP of the North West Province, and 1.28% of the GDP of South Africa. Rustenburg was one of the official host cities of the 2010 FIFA World Cup, being in close proximity to Phokeng, the capital of the Royal Bafokeng Nation, where the Royal Bafokeng Stadium is located. The England national football team also used this as their base camp for the tournament. History Mfecane Before European settlers arrived, the area had been settled by agrarian Setswana-speaking tribes Rustenburg's population is primarily Tswana people. Partially belonging to the Royal Bafokeng Nation, extensive landowners earning royalties from mining operations. The Royal Baf ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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